Access docker container by name

docker-update-hosts

#!/usr/bin/env bash
# /usr/local/bin/docker-update-hosts
# https://stackoverflow.com/questions/37242217/access-docker-container-from-host-using-containers-name/63656003#63656003


set -e -u -o pipefail

hosts_file=/etc/hosts
begin_block="# BEGIN DOCKER CONTAINERS"
end_block="# END DOCKER CONTAINERS"

if ! grep -Fxq "$begin_block" "$hosts_file"; then
    echo -e "\n${begin_block}\n${end_block}\n" >> "$hosts_file"
fi

(echo "| container start |" && docker events) | \
while read event; do
    if [[ "$event" == *" container start "* ]] || [[ "$event" == *" network disconnect "* ]]; then
        hosts_file_tmp="$(mktemp)"
        docker container ls -q | xargs -r docker container inspect | \
        jq -r '.[]|"\(.NetworkSettings.Networks[].IPAddress|select(length > 0) // "# no ip address:") \(.Name|sub("^/"; "")|sub("_1$"; ""))"' | \
        sed -ne "/^${begin_block}$/ {p; r /dev/stdin" -e ":a; n; /^${end_block}$/ {p; b}; ba}; p" "$hosts_file" \
        > "$hosts_file_tmp"
        chmod 644 "$hosts_file_tmp"
        mv "$hosts_file_tmp" "$hosts_file"
    fi
done

docker-update-hosts.service

# /etc/systemd/system/docker-update-hosts.service 
[Unit]
Description=Update Docker containers in /etc/hosts
Requires=docker.service
After=docker.service
PartOf=docker.service

[Service]
ExecStart=/usr/local/bin/docker-update-hosts

[Install]
WantedBy=docker.service

Thanks to fnkr: https://stackoverflow.com/questions/37242217/access-docker-container-from-host-using-containers-name/63656003#63656003